Yahoo! has begun testing a new addition to its search engine that allows users to see results as they type.
Commentators such as Search Engine Land's Danny Sullivan have already drawn comparisons with Google Instant, but Yahoo! claims the service is based on technology it has pioneered.
The organisation is currently trying out several versions of the tool, testing a number of variations of how the previews are displayed.
Unlike Google Instant, the top suggestion for a search comes with several additional pieces of information to the right of the preview bar.
One function of the system pay per click service providers may take note of is that the preview bar covers up paid ads, but the firm's senior vice-president of search products Shashi Seth told Mr Sullivan it is not impacting revenue.
Since Google's similar service was launched earlier this year, several analysts have been studying the effect it is having on online marketing, with commentator for Search Engine Land Benjamin Vigneron noting it has seen advertisers making greater use of shorter and more generic keywords.
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